Like toilet paper, soap, detergent, etc.12.

Leave instructions on how it is used (ie no dish soap) and a small box of dishwasher detergent or some dishwasher pods, so they can see what to use.

If they were having issues with the dishwasher not cleaning the dishes, it could be the detergent.

I supply toilet paper, paper towels, liquid hand soap at all sinks, dishdetergent, dishwasher pods, one new dishwashing sponge, spray oil, salt & pepper (I buy the plastic disposable ones for picnics so they can't be refilled) and a few other spices, trash bags, some cleaning supplies such as Simple Green and microfiber cloths, coffee filters, plastic wrap, ziploc baggies, laundry detergent, and dryer sheets.Guests are asked to bring their own shampoo, conditioner, personal soap for showers, sugar, creamer and coffee. 

Darker e-juices can stain carpet if spilled, but this is probably less of a risk than a kid spilling juice on the carpet and can usually be cleaned out with some dish detergent.  

Here are cheap methods to try first before calling someone:1.Baking soda and vinegar2.Drano 3.Drain snake 4.Dish detergent and boiling water

The cleaning fee usually covers not only the cleaning but also supplies such as paper towels, soap, laundry detergent, toilet paper, etc., etc. 

I have no problem buying generic brand detergent because to me there is no difference.

Other than that, you do not want to provide these appliances because people are notoriously hard on both, overstuffing them with clothes, using too much detergent, etc.When we rehab units we normally make all provisions that make it easy for the tenant to bring their own so that there's no reason for us to provide a washer or dryer. 

But I'm noting that trick about watering down the soap and dish detergent.